Please answer all the questions, only take it if you are SURE , any reference s

1)Is Pareto efficient allocation fair?

2) Is Pareto optimal fair

3) Is Pareto superior allocation fair?

4) Average total cost curve include the opportunity cost of the capital that a firm requires in a business

5) What is difference between Pareto efficient , Pareto optimal and Pareto superior ?

5) under the perfect competitve firm, it would produce the min point of the long run average cost curve? and why?

6) for a monopolist competitive firm, it would produce the min point of the long run average cost curve? and why?